CN105908697A - Method for strengthening foundation through horizontal grouting holes - Google Patents

Method for strengthening foundation through horizontal grouting holes Download PDF

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Publication number
CN105908697A
CN105908697A CN201610322087.3A CN201610322087A CN105908697A CN 105908697 A CN105908697 A CN 105908697A CN 201610322087 A CN201610322087 A CN 201610322087A CN 105908697 A CN105908697 A CN 105908697A
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CN
China
Prior art keywords
grouting
hole
milk
holes
grout
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610322087.3A
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Chinese (zh)
Inventor
张文超
薛炜
张俊兴
郭柏良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU CHEMICAL GROUTING ENGINEERING Co Ltd CHINESE ACADEMY OF SCIENCES
Original Assignee
GUANGZHOU CHEMICAL GROUTING ENGINEERING Co Ltd CHINESE ACADEMY OF SCIENCES
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Application filed by GUANGZHOU CHEMICAL GROUTING ENGINEERING Co Ltd CHINESE ACADEMY OF SCIENCES filed Critical GUANGZHOU CHEMICAL GROUTING ENGINEERING Co Ltd CHINESE ACADEMY OF SCIENCES
Priority to CN201610322087.3A priority Critical patent/CN105908697A/en
Publication of CN105908697A publication Critical patent/CN105908697A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12Consolidating by placing solidifying or pore-filling substances in the soil

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention discloses a method for strengthening a foundation through horizontal grouting holes. The method includes the steps that (1) vertical drill holes are distributed around an existing building subjected to fitting strengthening; (2) binary grout is injected into the vertical drill holes; (3) the horizontal grouting holes are drilled in the depth positions, needing grouting and strengthening, in the vertical drill holes, and the multiple rows of horizontal grouting holes can be distributed in the vertical direction within the range needing strengthening; and (4) grouting can be carried out directly through drill rods of a drilling system, or steel wire mesh framework plastic composite pipes are installed in the holes to serve as grouting pipes after the drill rods are pulled out, the demand for repeated grouting can be met by adopting the steel wire mesh framework plastic composite pipes as the grouting pipes, and the grouting pressure adopted in the grouting process is determined according to the depths of the positions where the grouting holes are located and also according to the main stress. The method for strengthening the foundation through the horizontal grouting holes is higher in operability, wider in application range, more remarkable in grouting effect and higher in reliability.

Description

A kind of foundation reinforcement method using lateral aperture to be in the milk
Technical field
The present invention relates to the technical field that existing construction foundation is reinforced, refer in particular to a kind of employing lateral aperture grouting Foundation reinforcement method.
Background technology
Since China's sixties in 20th century starts to apply in architectural engineering grouting technique, grouting is Basement process, impervious leakage-stopping engineering are extensively applied.So-called grouting is will by pressurized equipments such as grouting pumps Prefabricated inorganic or organic slurry is sent to the crack of structure foundation, fault belt or building originally In the seam of body, crack, thus improve and filled stratum or the impermeability of building and globality, be finally reached Meet building and use the bearing capacity limit value required.
At present, either floral tube grouting or sleeve valve grouting, the technique of grouting be all into vertically to boring After again along boring execute filling from bottom to top.Due to grouting time serosity dilation angle limited, and with the stratum filled The factor such as type, the degree of depth is relevant, if desired reaches preferable foundation stabilization effect, and grout hole is arranged the most very Close, pitch-row is generally 0.5~2m.It is no problem that this construction technology uses in new construction, but It is then to there is various deficiency in existing construction foundation is reinforced.
1, for reaching the purpose being uniformly in the milk, need in existing building internal bore when grout hole is arranged, not only Affect existing building to use, and destroy existing building base structure and water resistance greatly.
2, grout hole cannot be arranged in some position not possessing construction space;Practice is taked certain angle Inclined hole grouting, but coverage is big and positions extremely difficult.
3, serosity during grouting is under pressure, local diffusion the weakest in ground, it is difficult to ensure The uniformity of grouting, it is also difficult to controlled grouting amount and grouting scope.
Before the present invention makes, also there is the employing level foundation reinforcement method to grouting, such as published Bright patent CN1963046A.But this method is in order to realize level to grouting, it is necessary near existing building Excavation open caisson, uses jack to head into grout pipe in the open caisson of excavation.There are two big shortcomings in this method.
1, near existing building, excavate open caisson and there is bigger risk, be likely to result in existing building because opening simultaneously Dig and cause bigger deformation or inclination.
2, heading into horizontal direction grout pipe in open caisson the most radially, distance open caisson is the most remote, grouting Tube pitch is the biggest, and the uniformity of grouting is the poorest, causes only arranging the closeest region at open caisson rim grout pipe, Just can play the effect of consolidation by grouting ground.
In petroleum industry field, HORIZONTAL SIDETRACKING TECHNOLOGY IN is widely used.Specifically, it is i.e. to use spy The instrument of system, can form horizontal direction boring, such as the JLZ120 type well of China's independent research between upright opening Lower drive system can realize this function.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of operability is higher, the suitability more Extensively, grouting effect is more notable, the foundation reinforcement method of reliability higher employing lateral aperture grouting.
For achieving the above object, technical scheme provided by the present invention is: a kind of ground using lateral aperture to be in the milk Base reinforcement means, comprises the following steps:
1) arranging vertically to boring on the ground of existing building surrounding intending reinforcing, spacing is divided according to stratum The dilation angle of cloth and upright opening grouting considers, and boring hole depth should exceed the preferable soil layer of permeability, It is positioned at the bottom of hole that permeability is poor or water barrier;
2) vertically in boring, dual slurry is being poured into, the curtain that dual slurry will have been formed at existing building periphery Curtain, in order to grouting scope is limited in the building ground beneath intending reinforcing, thus reaches controlled grouting scope Purpose with grouting amount;
3) use down-hole drive type short radius tool system, vertically needing to carry out consolidation by grouting in boring Depth bores the grout hole of horizontal direction, and the scope that can reinforce as required is being vertically arranged many drainings Flat grout hole;
4) grouting can either use the drilling rod of drilling system to be directly in the milk, it is also possible to pacifies in hole after exiting drilling rod Steel loading mesh framework plastic composite pipe is as grout pipe, and uses steel wire mesh frame plastic composite tube as grouting Disclosure satisfy that the demand being repeatedly in the milk during pipe, the grouting pressure that grouting is used is little according to the degree of depth residing for grout hole Principal stress size determines.
In step 1) in, Completion of Drilling Hole a diameter of 100~200mm, pitch-row is 0.5m~2m.
In step 2) in, dual slurry is cement and waterglass mixed liquor, and hardening time is 30s.
In step 3) in, the grout hole drilling diameter of horizontal direction is 100~200mm, same horizontal plane On grout hole spacing be 0.5m~2m according to residing formation characteristics, and vertical direction array pitch is 0.5m~2m.
In step 4) in, grouting pressure p=k that grouting is used0γh+po, wherein k0For horizontal side pressure Force coefficient, γ is the average severe of the above soil layer of grout hole, and h is the degree of depth on grout hole center to ground, poFor Basement bottom of the building pressure.
In step 4) in, a diameter of 50mm of steel wire mesh frame plastic composite tube.
The present invention compared with prior art, has the advantage that and beneficial effect:
1, the inventive method is when reinforcing existing construction foundation, does not affect existing building during strengthening construction Use, do not affect the safety and stability of existing building.
2, using the grouting of plasm pouring in plane hole, serosity spreads along hole surrounding, under same grouting pressure, everywhere Diffusion is more uniform, and grouting coverage is bigger, reinforces globality more preferable.
3, employing vertically draws hole to boring conduct, all vertically to holing all outside existing building, level Grout hole but can be evenly arranged in below basis, will not damage existing building base structure.
4, in boring, vertically pour into dual slurry, form the curtain closed, the slurry in bound level grout hole Liquid, can effectively controlled grouting scope and grouting amount in the following scope diffusion of existing building basis.
Accompanying drawing explanation
Fig. 1 is lateral aperture consolidation by grouting sectional view of the present invention.
Fig. 2 is of the present invention vertically to the combination top view of boring with plasm pouring in plane hole.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
As depicted in figs. 1 and 2, the foundation reinforcement method described in the present embodiment, comprise the following steps:
1, arrange vertically to boring 1 on the ground 4 of existing building 3 surrounding intending reinforcing.Completion of Drilling Hole Diameter 100~200mm, the dilation angle that spacing is in the milk according to distribution of strata and upright opening considers, pitch-row For 0.5m~2m.Hole spacing existing building should not be the most remote, in order to controlled grouting amount, also should not be too near, Avoid affecting existing building to use.Boring hole depth should exceed the preferable soil layer of permeability, is positioned at infiltration at the bottom of hole Property is poor or in water barrier.
2, vertically pouring into dual slurry in boring 1, dual slurry is usually cement and waterglass mixed liquor, its Hardening time about 30s.The curtain that dual slurry will have been formed at existing building periphery, in order to scope of being in the milk It is limited in the building ground beneath intending reinforcing, thus reaches controlled grouting scope and the purpose of grouting amount.
3, use down-hole drive type short radius tool system, vertically needing to carry out consolidation by grouting in boring 1 Depth bore horizontal direction grout hole 2.The drilling diameter 100~200mm of the grout hole 2 of horizontal direction, Grout hole spacing on same horizontal plane can be 0.5m~2m according to residing formation characteristics, and can basis The scope needed reinforcement is being vertically arranged multiple rows of plasm pouring in plane hole, and vertical direction array pitch is 0.5m~2m.
4, grouting can use the drilling rod of drilling system to be directly in the milk, it is possible to installs diameter after exiting drilling rod in hole The steel wire mesh frame plastic composite tube of 50mm is as grout pipe.Use steel wire mesh frame plastic composite tube as filling Slurry Guan Shike meets the demand being repeatedly in the milk.The grouting pressure that grouting is used can be according to the degree of depth residing for grout hole Minor principal stress size determines.Wherein, grouting pressure p=k0γh+po, k in formula0For lateral pressure coefficient, γ is the average severe of the above soil layer of grout hole, and h is the degree of depth on grout hole center to ground, poFor building base Bottom pressure.
Embodiment described above is only the preferred embodiments of the invention, not limits the enforcement model of the present invention with this Enclose, therefore the change that all shapes according to the present invention, principle are made, all should contain within the scope of the present invention.

Claims (6)

1. the foundation reinforcement method using lateral aperture to be in the milk, it is characterised in that comprise the following steps:
1) arranging vertically to boring on the ground of existing building surrounding intending reinforcing, spacing is divided according to stratum The dilation angle of cloth and upright opening grouting considers, and boring hole depth should exceed the preferable soil layer of permeability, It is positioned at the bottom of hole that permeability is poor or water barrier;
2) vertically in boring, dual slurry is being poured into, the curtain that dual slurry will have been formed at existing building periphery Curtain, in order to grouting scope is limited in the building ground beneath intending reinforcing, thus reaches controlled grouting scope Purpose with grouting amount;
3) use down-hole drive type short radius tool system, vertically needing to carry out consolidation by grouting in boring Depth bores the grout hole of horizontal direction, and the scope that can reinforce as required is being vertically arranged many drainings Flat grout hole;
4) grouting can either use the drilling rod of drilling system to be directly in the milk, it is also possible to pacifies in hole after exiting drilling rod Steel loading mesh framework plastic composite pipe is as grout pipe, and uses steel wire mesh frame plastic composite tube as grouting Disclosure satisfy that the demand being repeatedly in the milk during pipe, the grouting pressure that grouting is used is little according to the degree of depth residing for grout hole Principal stress size determines.
A kind of foundation reinforcement method using lateral aperture to be in the milk the most according to claim 1, its feature exists In: in step 1) in, Completion of Drilling Hole a diameter of 100~200mm, pitch-row is 0.5m~2m.
A kind of foundation reinforcement method using lateral aperture to be in the milk the most according to claim 1, its feature exists In: in step 2) in, dual slurry is cement and waterglass mixed liquor, and hardening time is 30s.
A kind of foundation reinforcement method using lateral aperture to be in the milk the most according to claim 1, its feature exists In: in step 3) in, the grout hole drilling diameter of horizontal direction is 100~200mm, same horizontal plane On grout hole spacing be 0.5m~2m according to residing formation characteristics, and vertical direction array pitch be 0.5m~ 2m。
A kind of foundation reinforcement method using lateral aperture to be in the milk the most according to claim 1, its feature exists In: in step 4) in, grouting pressure p=k that grouting is used0γh+po, wherein k0For horizontal side pressure Force coefficient, γ is the average severe of the above soil layer of grout hole, and h is the degree of depth on grout hole center to ground, poFor Basement bottom of the building pressure.
A kind of foundation reinforcement method using lateral aperture to be in the milk the most according to claim 1, its feature exists In: in step 4) in, a diameter of 50mm of steel wire mesh frame plastic composite tube.
CN201610322087.3A 2016-05-16 2016-05-16 Method for strengthening foundation through horizontal grouting holes Pending CN105908697A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110820450A (en) * 2019-11-15 2020-02-21 上海宝冶市政工程有限公司 Horizontal reinforcing and reverse construction method for road
CN112343106A (en) * 2019-08-09 2021-02-09 北京恒祥宏业基础加固技术有限公司 Construction method for settlement reinforcement, lifting and deviation correction of high-rise building
CN113279729A (en) * 2021-06-10 2021-08-20 中国矿业大学(北京) Gas extraction method for leaking stoppage and concentration
CN114109454A (en) * 2021-11-10 2022-03-01 北京国电水利电力工程有限公司 Treatment method for micro-fracture water damage of grotto rock mass

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3672478B2 (en) * 2000-05-29 2005-07-20 東日本旅客鉄道株式会社 Double-structure solidified pile with tubular steel and its construction method
CN1963046A (en) * 2006-11-24 2007-05-16 浙江理工大学 Method for transversal reinforcement and grouting underpinning of ready construction foundation
KR100927038B1 (en) * 2009-06-02 2009-11-17 하리기술이십이 주식회사 Pipe grouting method using ufunctional injection pipes
CN104032728A (en) * 2014-06-16 2014-09-10 浙江工业大学 Vacuum grouting process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3672478B2 (en) * 2000-05-29 2005-07-20 東日本旅客鉄道株式会社 Double-structure solidified pile with tubular steel and its construction method
CN1963046A (en) * 2006-11-24 2007-05-16 浙江理工大学 Method for transversal reinforcement and grouting underpinning of ready construction foundation
KR100927038B1 (en) * 2009-06-02 2009-11-17 하리기술이십이 주식회사 Pipe grouting method using ufunctional injection pipes
CN104032728A (en) * 2014-06-16 2014-09-10 浙江工业大学 Vacuum grouting process

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* Cited by examiner, † Cited by third party
Title
万昭明: "双液注浆法在住宅楼湿陷性黄土地基加固中的应用", 《建筑与施工》 *
吴琳等: "水平孔灌浆法在楼房地基加固中的应用", 《山西冶金》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112343106A (en) * 2019-08-09 2021-02-09 北京恒祥宏业基础加固技术有限公司 Construction method for settlement reinforcement, lifting and deviation correction of high-rise building
CN110820450A (en) * 2019-11-15 2020-02-21 上海宝冶市政工程有限公司 Horizontal reinforcing and reverse construction method for road
CN113279729A (en) * 2021-06-10 2021-08-20 中国矿业大学(北京) Gas extraction method for leaking stoppage and concentration
CN114109454A (en) * 2021-11-10 2022-03-01 北京国电水利电力工程有限公司 Treatment method for micro-fracture water damage of grotto rock mass
CN114109454B (en) * 2021-11-10 2024-06-18 北京国电水利电力工程有限公司 Method for treating grotto rock mass microcrack water damage

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Application publication date: 20160831